I am inside the Journey and DE is the entry source. There is a filter applied in Decision split known as ‘double_opt_in’ (can be true or false).
This ‘double_opt_in’ field is not in Entry source DE, but some other DE. This journey was created by someone else in the past. (I know that in order access fields not available in entry source DE we need to do linking within a Attribute Group in Data Designer )
My question is, How to know which is the attribute group in which these 2 DE are linked in Data Designer? There are several Attribute groups in Data Designer